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  • San Jose - San Francisco - Oakland - Bay Area
    Welcome to AC's website.
    CNC machine shop
    CNC Machining Materials:
    Steel, aluminum, plastics, brass, copper, hastelloy, titanium and exotic materials

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    5 axis machined fancy part We machine more than 20 engineering-grade metal and plastic materials. There are limitations on the sizes and thicknesses of some metals and plastics because not every part can be made in every material. Custom machining consists of a surprisingly diverse set of works.

    With seemingly endless options for customization, materials, and techniques, cnc machining can produce parts for many industries and people's needs. We use the newest 5 axis cnc equipment (Haas UMC 750 and Haas VF-5SS ) as well as all fashioned conventional lathe and milling machines (Bridgeport, Hardinge). If you require a material that is not on the list or have specific questions, please let us know and call our cnc machine shop ( we do not machine wood parts).

    We provide Turning and Milling, 3 axis , 3+2 axis & continuous 5 axis cnc machining.

    We accept both small and large run jobs, Minimum quantity for order is 1.
    Short lead times are often available 2-3 days.
    Standard lead time is 2 weeks.

    Click on a link to get more information on materials and parts.
    Type Alloy (parts) Features and characteristics Application (Industry)
    Aluminum
    • Improved corrosion resistance over 7075
    • General purpose aluminum with Medium strength
    • Good formability, weldability
    • Containes magnesium and silicon
    Electronic hardware, prototypes, aircraft fittings, camera lens mounts, couplings, marines fittings and hardware
    • Higher strength over Aluminum 6061
    • Good fatigue strength
    Gears and shafts, fuse parts, meter shafts and gears, missile parts, regulating valve parts, worm gears, keys, aircraft, aerospace and defense applications; bike frames
    Brass
    • Good corrosion resistance
    • Resistant to most chemicals
    • Plate stock
    Electronic hardware and contacts, fittings, commercial products, Aerospace
    Copper
    • Oxygen-free electrical copper
    • High electrical conductivity
    • Good corrosion resistance in most environments
    • Weak against acids, halogens sulphides and ammonia solutions
    Electrical contacts, general engineering, automotive, domestic appliances
    Plastics Ceramic Peek
    • Excellent dimensional stability, good impact strength
    • Stiffness an minimum levels of creep, better impact resistance
    • Excellent machinability
    Test sockets, switches, connectors
    PVC
    • Excellent chemical and corrosion resistance
    • Good flame resistance
    • Low cost
    Used for everything, from construction profiles to medical devices, from roofing membranes to credit cards, from childrens toys to pipes for water and gas
    Nylon 6/6
    • General purpose Nylon
    • Fair flame resistance and good machining
    Insulators, bearings
    Hastelloy
    • Excellent mechanical strength, especially at high temperatures
    • both highly resistant to corrosion and oxidation
    Pressure vessels of some nuclear reactors, chemical reactors, distillation equipment, pipes and valves in chemical industry
    Alloy Steel
    4041
    • Good toughness and strength
    • Direct hardening and heat treatable
    • Harder than CR 1018
    Higher stress applications needing the strength of an alloy
    Steel
    1018
    • Plain low carbon steel
    • Good formability and weldability
    • Case harden only
    Rivets and parts requiring strong welds
    12L14
    • Excellent machinability
    • Case harden only
    Endless commercial products; probably more pounds used in turned products than any other bar stock
    1137
    • Higher carbon, higher strength
    • Direct hardening
    Higher stress applications, gears, shafts, studs
    Stainless Steel
    304
    • Most commonly used stainless steel
    • Low carbon
    • Better weldability and formability
    Household and industrial applications: screws, machinery parts, car headers, food-handling equipment,
    316
    • Increased corrosion and chemical resistance over 304
    • Increased resistance to cracking and pitting
    Medical implants and surgical instruments, aerospace
    416
    • Free machining
    • Less corosion resistant than 300 series
    • Can be heat treated
    Applications that need less corrosion resistance, more hardness, or lower cost
    17-4 PH
    • Higher magnetism than 304 and 316 stainless steel
    • Oxidation and corrosion resistance
    Medical, aerospace, applications needing corrosion resistance and hardness
    Molybdenum
    • Low thermal expansion
    • Consists of around 36% nickel and 64% iron
    Frequently used in the electronics industry for semiconductor supports and glass sealing
    Tungusten
    A95
    • Highest melting point and the highest tensile strength
    • Extremely durable
    Light bulb filaments, X-ray tubes, electrodes, superalloys, radiation shielding and military applications in penetrating projectiles
    Kovar
    ASTM F15
    • Thermal expansion similar to glass
    • Alloy for glass sealing
    Light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other
    scientific research
    Titanium
    Ti-6AI-4V
    • Light-weight and high strength
    • High temperature and corrosion resistance
    Aircraft industry, jewelry, medical implants
    Invar
    64FeNi
    • Uniquely low coefficient of thermal expansion
    • Consists of around 36% nickel and 64% iron
    Used where high dimensional stability is required: instruments, clocks, seismic creep gauges, valves in engines and antimagnetic watches


    Copper, Brass and Bronze alloys explained


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